HIGH-SPEED CYCLING OF STORAGE-BATTERY CELLS WITH ENHANCED CURRENT Russian patent published in 2006 - IPC H01M10/44 H02J7/00 

FIELD: technical electrochemistry and electrical engineering; lead-acid battery production.

SUBSTANCE: proposed method for high-speed cycling of battery cells with enhanced current includes battery filling with electrolyte, assembly of batteries in groups, their installation in liquid coolant filled reservoirs and settling-down, followed by multistage cycling with dc or pulse current. This treatment is effected in five stages; first stage involves passage of dc cycling current of 0.002-0.03C_n through battery for 10-60 minutes, its direction being reverse to normal one; during second stage current is reversed to normal and held within 0.002-0.03C_n for 10-60 minutes; third stage involves cycling with variable-polarity pulse current at charge pulse length of 100-300 s and discharge pulse length of 10-20 s, charge pulse amplitude being increased to 0.3-0.7C_n; fourth stage involves cycling for 1-3 h with variable-polarity pulse current at same length of charge and discharge pulses and constant amplitude of discharge pulses ranging between 0.3 and 0.7C_n; during fifth stage cycling is effected with variable-polarity pulse current and same length of charge and discharge pulses, amplitude of charge pulses being reduced to 0.15-0.4C_n; on-line control of third through fifth cycling stages is effected by using discharge pulses set up due to cell discharge across standard resistor as test ones and comparing their amplitude with experimental normalized amplitudes for each stage. Such procedure enables optimization of cycling lead-acid batteries with heavy current within short period at reduced in-process polarization of plates and their recharge, as well as enhancement of energy-intensive modification of β-PbO₂ in positive-plate active material whose strength is also enhanced.

EFFECT: reduced gassing and power requirement for cycling process; improved cold-start starter characteristics and enlarged service life of storage batteries.

1 cl, 1 dwg